Historical examples (ISDN, Teletex, telefax, telex) show us that forecasting efforts in thetelecommunication sector can go awry – not only by a few percentage points but by largemagnitudes. We maintain that with strong network effects it is not possible to forecast thesuccess of...

In this article we provide a seminal academic investigation of mo-bile telephony consumers' perception of the recently introduced costcap tari in comparison to corresponding pay-per-use and atrate call-ing plans. Previous studies have identied several psychological eectsthrough which consumers...

In order to con¯ne excessive levels of temporary layo®s, US ¯rms are taxed - albeit incom-pletely - according to the unemployment insurance bene¯ts claimed by their laid o® workers.In contrast, German construction ¯rms are not charged according to their layo® historyand should thus have...